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2001 Oldsmobile Silhouette - Gas gauge

Gas gauge quick working

By chance did you mean quit instead of quick?

The fuel sending unit is probably failing, possibly due to deposits on the float mechanism

A sharp mechanic can determine if the problem is the fuel sending unit, wiring or the cluster itself

In other words, don’t go to Jiffy Lube to get this figured out

If it turns out the fuel sending unit is the culprit . . . the most common scenario, in my opinion . . . the best option is clearly to replace it. However, you may have luck using top tier rated fuel. On one of my cars, using top tier rated fuel actually fixed the problem. Sure beats replacing parts